Publications by authors named "Ryo Anma"
The Chile Triple Junction, where the hot active spreading centre of the Chile Rise system subducts beneath the South American plate, offers a unique opportunity to understand the influence of the anomalous thermal regime on an otherwise cold continental margin. Integrated analysis of various geophysical and geological datasets, such as bathymetry, heat flow measured directly by thermal probes and calculated from gas hydrate distribution limits, thermal conductivities, and piston cores, have improved the knowledge about the hydrogeological system. In addition, rock dredging has evidenced the volcanism associated with ridge subduction.
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- Sampling intact oceanic crust through various geological layers is crucial for understanding mid-ocean ridge formation, yet remains a scientific challenge.
- Recent drilling at Hole 1256D in the eastern Pacific Ocean successfully accessed gabbro at a depth of 1157 meters, providing insight into crust formed at superfast spreading rates.
- The discovery of gabbros, which reflect crystallized melt lenses, aligns with seismic predictions that suggest shallower melt lenses occur faster spreading rates and suggests a complex interaction with the surrounding metamorphosed dikes and lavas.